Or sleep deprivation could mask the positive cognitive effects.

或者睡眠不足可能也会掩盖积极的认知效果。

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Dust limits the amount of solar radiation that reaches the Earth, for example, a factor that could mask the warming effects of increasing atmospheric carbon dioxide.

灰尘限制了到达地表的太阳辐射数量，举例来说，会减缓因二氧化碳浓度增高而缠身滚的大气温室效应。

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An all round photo app with frames, effects, rich hi-res clip-art, high resolution save, stickers, rotation, brushes and mask modes.

一个全能的照片应用，包含镜框、效果、丰富的高分辨率剪贴艺术、高分辨率保存、标签、画笔与蒙板模式。

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The letter cited several studies that showed stimulants such as caffeine mask the intoxicating effects of alcohol and could lead to increased risk-taking and other alcohol-related problems such as violence, sexual assault, traffic accidents and even suicide.

CNN: FDA: Caffeinated alcoholic drinks may be illegal

Ms. Taylor finished her workday wearing the mask, with no ill effects, says Ms. Ioannou.

WSJ: People Who Never Miss a Day of Work

Such policies just mask inflation and can make its effects worse by encouraging demand for items that are in scarcity.

FORBES: Markets: Risk Aversion But Not Risks Averted